Rochester, Ward 4, New York William H.Yeomans Head b.Dec 1858, age 41, married 19 years, born Canada, parents born Canada. Harriet Wife b. May 1865, 35, had 8 children 5 living, born Canada, parents born Canada Margaret B. dau b. Feb 1883, 17, born Canada Emmanuel B. son, b. Sept 1886, 13, born Canada Joseph A. son, b. June 1888, 11, born Canada Annie M. dau, b. Dec 1892, 7, born Canada Clarissa B, dau, b. Oct 1895, 4, born New York
A marriage lic for William Henry and Harriet. Marriage took place November 3, 1880, Newburgh, Ontario Groom: William Henry Youmans, age 22, born Camden, Ontario, parents George Arthur and Clarissa Jane Youmans. Bride: Harriet Amelia Whiteman, age 17, born Camden, Ont. parents Joseph and Ann Whiteman.
I can't find any of the children on the 1910 census. I found a Hattie Yeoman listed in Rochester. She was running a boarding house. I also found a William Yeoman of the correct age who is lodging in Elmira. So it seems there is a bit of a mystery.
I hope this helps. I am not related to this family Cheers Pam B